Small block MP .528 solid cam - which valve springs?

Thanks man.

For RhS heads, trying to figure out what kind of valves I need based on how much machining to the spring seats I need to do. Not as easy as it seems.

you have to cut the guides/spring seat down for doubles in order to locate the inner spring.

Check for what seals the guides are setup for, and also retainer to guide clearance at the lift you are running, you can do a mock up with
cam/1lifter/pushrod/1 rocker + shaft/ 1 valve w/lite checking spring and then measure at the retainer.
But just having the theoretical 500/496 lift clearance between retainer/guide should be fine.

me, I like to know.